BIS vs. KORU
BIS (ProShares UltraShort Nasdaq Biotechnology) and KORU (Direxion Daily South Korea Bull 3X Shares) are both Leveraged Equities funds - BIS tracks the NASDAQ Biotechnology Index (-200%) while KORU tracks the MSCI Korea 25-50 Index. Both are passively managed. Over the past 10 years, BIS returned -26.06%/yr vs 14.49%/yr for KORU. At a correlation of -0.38, they often move in opposite directions. BIS charges 0.95%/yr vs 1.29%/yr for KORU.
Performance
BIS vs. KORU - Performance Comparison
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Returns By Period
In the year-to-date period, BIS achieves a -17.93% return, which is significantly lower than KORU's 285.56% return. Over the past 10 years, BIS has underperformed KORU with an annualized return of -26.06%, while KORU has yielded a comparatively higher 14.49% annualized return.
BIS
- 1D
- -1.74%
- 1M
- -10.00%
- YTD
- -17.93%
- 6M
- -14.94%
- 1Y
- -55.93%
- 3Y*
- -24.98%
- 5Y*
- -14.70%
- 10Y*
- -26.06%
KORU
- 1D
- -35.70%
- 1M
- -10.30%
- YTD
- 285.56%
- 6M
- 341.44%
- 1Y
- 858.44%
- 3Y*
- 100.70%
- 5Y*
- 11.21%
- 10Y*
- 14.49%
BIS vs. KORU - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
BIS ProShares UltraShort Nasdaq Biotechnology | -17.93% | -45.95% | 4.79% | -6.54% | -2.14% | -14.74% | -56.01% | -41.01% | 5.14% | -36.98% |
KORU Direxion Daily South Korea Bull 3X Shares | 285.56% | 432.73% | -62.18% | 28.61% | -70.16% | -33.86% | 48.78% | 5.47% | -59.89% | 167.08% |
Correlation
The correlation between BIS and KORU is -0.32, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | -0.32 |
Correlation (3Y) Calculated over the trailing 3-year period | -0.35 |
Correlation (5Y) Calculated over the trailing 5-year period | -0.40 |
Correlation (10Y) Calculated over the trailing 10-year period | -0.40 |
Correlation (All Time) Calculated using the full available price history since Apr 10, 2013 | -0.38 |
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Return for Risk
BIS vs. KORU — Risk / Return Rank
BIS
KORU
BIS vs. KORU - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for ProShares UltraShort Nasdaq Biotechnology (BIS) and Direxion Daily South Korea Bull 3X Shares (KORU). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| BIS | KORU | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -7.40 | ||
| Sortino ratioReturn per unit of downside risk | -5.89 | ||
| Omega ratioGain probability vs. loss probability | 0.75 | 1.53 | -0.78 |
| Calmar ratioReturn relative to maximum drawdown | -1.02 | 14.12 | -15.14 |
| Martin ratioReturn relative to average drawdown | -1.39 | 41.38 | -42.77 |
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Drawdowns
BIS vs. KORU - Drawdown Comparison
The maximum BIS drawdown since its inception was -99.87%, roughly equal to the maximum KORU drawdown of -95.79%. Use the drawdown chart below to compare losses from any high point for BIS and KORU.
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Drawdown Indicators
| BIS | KORU | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -99.87% | -95.79% | -4.08% |
Max Drawdown (1Y)Largest decline over 1 year | -55.07% | -61.39% | +6.32% |
Max Drawdown (3Y)Largest decline over 3 years | -67.92% | -73.34% | +5.42% |
Max Drawdown (5Y)Largest decline over 5 years | -75.59% | -93.34% | +17.75% |
Max Drawdown (10Y)Largest decline over 10 years | -95.40% | -95.79% | +0.39% |
Current DrawdownCurrent decline from peak | -99.87% | -44.66% | -55.21% |
Average DrawdownAverage peak-to-trough decline | -90.04% | -57.41% | -32.63% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 41.32% | 20.91% | +20.41% |
Volatility
BIS vs. KORU - Volatility Comparison
The current volatility for ProShares UltraShort Nasdaq Biotechnology (BIS) is 13.79%, while Direxion Daily South Korea Bull 3X Shares (KORU) has a volatility of 92.27%. This indicates that BIS experiences smaller price fluctuations and is considered to be less risky than KORU based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| BIS | KORU | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 13.79% | 92.27% | -78.48% |
Volatility (6M)Calculated over the trailing 6-month period | 32.10% | 138.63% | -106.53% |
Volatility (1Y)Calculated over the trailing 1-year period | 40.51% | 144.16% | -103.65% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 43.80% | 91.40% | -47.60% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 46.26% | 83.03% | -36.77% |
BIS vs. KORU - Expense Ratio Comparison
BIS has a 0.95% expense ratio, which is lower than KORU's 1.29% expense ratio.
Dividends
BIS vs. KORU - Dividend Comparison
BIS's dividend yield for the trailing twelve months is around 5.61%, more than KORU's 0.24% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|
BIS ProShares UltraShort Nasdaq Biotechnology | 5.61% | 5.25% | 3.73% | 1.75% | 0.00% | 0.00% | 0.45% | 2.11% | 0.37% | 0.00% |
KORU Direxion Daily South Korea Bull 3X Shares | 0.24% | 0.89% | 4.10% | 2.55% | 0.48% | 0.76% | 0.01% | 0.93% | 1.40% | 3.59% |
Frequently Asked Questions
BIS and KORU have a correlation of -0.32, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
KORU has higher volatility (92.27%) compared to BIS (13.79%). In terms of maximum drawdown, BIS dropped -99.87% vs KORU's -95.79%.
On 10-year performance, KORU leads with 14.49% vs -26.06% for BIS. On fees, BIS is cheaper at 0.95% per year. On volatility, BIS has been the lower-risk option at 13.79%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 10-year period, KORU has performed better with a 14.49% return vs -26.06%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
BIS is cheaper with a 0.95% expense ratio, compared with 1.29% for KORU.
BIS has the higher dividend yield at 5.61%, compared with 0.24% for KORU.
BIS tracks NASDAQ Biotechnology Index (-200%), while KORU tracks MSCI Korea 25-50 Index. They also come from different issuers: ProShares and Direxion. Their fees differ too: 0.95% for BIS and 1.29% for KORU.
KORU currently has the higher Sharpe Ratio (6.02 vs -1.38), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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